/usr/lib/llvm-4.0/include/lldb/Symbol/ is in liblldb-4.0-dev 1:4.0.1-10~deb9u2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/llvm-4.0/include/lldb/Symbol/ArmUnwindInfo.h
/usr/lib/llvm-4.0/include/lldb/Symbol/Block.h
/usr/lib/llvm-4.0/include/lldb/Symbol/ClangASTContext.h
/usr/lib/llvm-4.0/include/lldb/Symbol/ClangASTImporter.h
/usr/lib/llvm-4.0/include/lldb/Symbol/ClangExternalASTSourceCallbacks.h
/usr/lib/llvm-4.0/include/lldb/Symbol/ClangExternalASTSourceCommon.h
/usr/lib/llvm-4.0/include/lldb/Symbol/ClangUtil.h
/usr/lib/llvm-4.0/include/lldb/Symbol/CompactUnwindInfo.h
/usr/lib/llvm-4.0/include/lldb/Symbol/CompileUnit.h
/usr/lib/llvm-4.0/include/lldb/Symbol/CompilerDecl.h
/usr/lib/llvm-4.0/include/lldb/Symbol/CompilerDeclContext.h
/usr/lib/llvm-4.0/include/lldb/Symbol/CompilerType.h
/usr/lib/llvm-4.0/include/lldb/Symbol/DWARFCallFrameInfo.h
/usr/lib/llvm-4.0/include/lldb/Symbol/DebugMacros.h
/usr/lib/llvm-4.0/include/lldb/Symbol/DeclVendor.h
/usr/lib/llvm-4.0/include/lldb/Symbol/Declaration.h
/usr/lib/llvm-4.0/include/lldb/Symbol/FuncUnwinders.h
/usr/lib/llvm-4.0/include/lldb/Symbol/Function.h
/usr/lib/llvm-4.0/include/lldb/Symbol/GoASTContext.h
/usr/lib/llvm-4.0/include/lldb/Symbol/JavaASTContext.h
/usr/lib/llvm-4.0/include/lldb/Symbol/LineEntry.h
/usr/lib/llvm-4.0/include/lldb/Symbol/LineTable.h
/usr/lib/llvm-4.0/include/lldb/Symbol/OCamlASTContext.h
/usr/lib/llvm-4.0/include/lldb/Symbol/ObjectContainer.h
/usr/lib/llvm-4.0/include/lldb/Symbol/ObjectFile.h
/usr/lib/llvm-4.0/include/lldb/Symbol/Symbol.h
/usr/lib/llvm-4.0/include/lldb/Symbol/SymbolContext.h
/usr/lib/llvm-4.0/include/lldb/Symbol/SymbolContextScope.h
/usr/lib/llvm-4.0/include/lldb/Symbol/SymbolFile.h
/usr/lib/llvm-4.0/include/lldb/Symbol/SymbolVendor.h
/usr/lib/llvm-4.0/include/lldb/Symbol/Symtab.h
/usr/lib/llvm-4.0/include/lldb/Symbol/TaggedASTType.h
/usr/lib/llvm-4.0/include/lldb/Symbol/Type.h
/usr/lib/llvm-4.0/include/lldb/Symbol/TypeList.h
/usr/lib/llvm-4.0/include/lldb/Symbol/TypeMap.h
/usr/lib/llvm-4.0/include/lldb/Symbol/TypeSystem.h
/usr/lib/llvm-4.0/include/lldb/Symbol/UnwindPlan.h
/usr/lib/llvm-4.0/include/lldb/Symbol/UnwindTable.h
/usr/lib/llvm-4.0/include/lldb/Symbol/Variable.h
/usr/lib/llvm-4.0/include/lldb/Symbol/VariableList.h
/usr/lib/llvm-4.0/include/lldb/Symbol/VerifyDecl.h